# Relationship history for MSHA mine 0402699

Current hierarchy: **Ted E  Contri; Ted E  Contri → Mercer Fraser Company → Cooks Valley**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Mercer Fraser Company → Cooks Valley; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bott William F → Cooks Valley; 1950-01-01 to 2002-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Bott William F → Mercer Fraser Company; 1950-01-01 to 2002-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Ted E  Contri  et al → Cooks Valley; 2002-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ted E  Contri  et al → Mercer Fraser Company; 2002-01-16 to current/open; source msha-controller-operator-history